README

守护进程辅助工具

安装

composer require crutch/daemon:^1.0

使用

创建工作运行器

#!/usr/bin/env php
<?php
// crutch_worker_demo.php

declare(strict_types=1);

require_once __DIR__ . '/vendor/autoload.php';

$worker = function () {
    while (true) {
        sleep(1);
    }
};

$pidFile = '/tmp/crutch-daemon.pid';

$daemon = new \Crutch\Daemon\Daemon($pidFile);

$action = $argv[1] ?? '';
$num = max(1, intval($argv[2] ?? '1'));


switch ($action) {
    case 'start':
        try {
            $daemon->start($worker, $num);
        } catch (\Crutch\Daemon\Exception\DaemonException $exception) {
            printf("Could not start daemon: %s\n", $exception->getMessage());
            exit($exception->getCode());
        }
        break;
    case 'listen':
        $daemon->listen($worker);
        break;
    case 'stop':
        try {
            $daemon->stop();
        } catch (\Crutch\Daemon\Exception\DaemonException $exception) {
            printf("Could not stop daemon: %s\n", $exception->getMessage());
            exit($exception->getCode());
        }
        break;
    default:
        print("unknown action\n");
        exit(127);
}

运行它

php ./crutch_worker_demo.php start 3

检查进程

ps aux | grep crutch_worker_demo

user       58576  0.0  0.0 140080 11624 ?        Ss   17:58   0:00 php ./crutch_worker_demo.php start
user       58577  0.0  0.0 140080  9584 ?        S    17:58   0:00 php ./crutch_worker_demo.php start
user       58578  0.0  0.0 140080  9584 ?        S    17:58   0:00 php ./crutch_worker_demo.php start
user       58579  0.0  0.0 140080  9584 ?        S    17:58   0:00 php ./crutch_worker_demo.php start
user       58580  0.0  0.0   9116  2488 pts/3    S+   17:58   0:00 grep --color=auto crutch_worker_demo

您看到1个父进程（PID=58576）和3个子进程（PIDs=58577, 58578和58579）。进程58580是grep，忽略它。

停止进程

php ./crutch_worker_demo.php stop

检查进程

ps aux | grep crutch_worker_demo

user       59825  0.0  0.0   9116  2488 pts/3    S+   17:58   0:00 grep --color=auto crutch_worker_demo

所有进程已被杀死。